The probability of getting a prime number

Question:

The probability of getting a prime number is the same as that of a composite number in a throw of a dice.

Solution:

False.

The composite numbers in a dice are 4 and 6.

Probability = total number of composite numbers/ Total numbers

= 2/6 … [divide numerator and denominator by 2]

= 1/3

The prime numbers in a dice are 2, 3 and 5.

Probability = total number of prime numbers/ Total numbers

= 3/6 … [divide numerator and denominator by 3]

= ½

Leave a comment